We: PLEUROBEMA 
Unio doumeti LerouRNEUX and Bourcuicnat, Prod. Mal. 
Tunis, p. 163. 
Unio distortus Bran, Ann. and Mag., 1836, p. 376, ne. 53. 
Unio uber Conrad, Am. Jl. Conch., IT, p. 279. 
Mya obovata SoLANpER, Portland Cat., p. 100. 
Unio specialis Kort, Icon., new ed., XIX, NGI2, pi S,. pk 
DXV, fig. 2694. 
Unio hyperamblius Kopevr, Icon., new ed., XIX, TOUS, ps has 
pl. pxrx, fig. 2701. 
Unio diarbekerianus Koxe., Icon., new ed., XIX, 1912, p. 15 
pl. Dx1x, fig. 2702. 
, 
Umio calliopsis Kozutt, Icon., new ed., XIX, 1912, p. 15, pl. 
DXIX, fig! 2702. 
Umio deschampsi Konrttr, Icon., new ed., XIX, 1912, p. 28, 
pl. Dxx1v, fig. 2721. | 
Unio raymondopsis Kovetyr, Icon., new ed., XTX, 1912, p. 30, 
pl. Dxxv, fig. 2724. 
Unio kuwetkensis Kosar, Icon., new ed., XIX, 1912, p. 31, 
pl. DXXV, fies 2725: 
Umo ancyrensis Kose, Icon., new ed., XIX, 1912, p. 32, pl. 
DXXVI, fig. 2727. 
Unio ancyrensis var. louisei Korner, Icon., new ed., XIX, 
IOT2, p. 32; ‘pl. Dxxv1, fig! 2726. 
Unio bitlisensis Koper, Icon., new ed., XIX, 1912, p. 35, pl. 
DXXVING es 2731, 
Unio raymondi Locarp, Moll. Lacs ‘Tiberiade, p. 208.—Kosett, 
Icon., new ed., XIX, 1912, p. 40; pl. pxxx1, fig. 2738. 
Genus PLEUROBEMA (Rafinesque, 1820) Agassiz. 
Pleurobema Rarrnesour, Ann. Gen. Sci. Phys., Brux, 1820, 
p. 313.—ORTMANN, Ann. Car. Mus., VIII, 1912, p. 261. 
Shell solid, triangular to rhomboid, usually with a prominent 
umbonal region; beaks at or near the anterior end of the shell, 
incurved and pointed forward over a small but well-developed 
